The earth takes 1 year to revolve around the sun at 1 A. U. distance (an astronomical unit = 93,000,000 miles). If a planet were 4 A. U. from the sun, how many years would it take to make 1 orbit?

The answer

at 1 A. U. distance for 1 year

If a planet were 4 A. U. from the sun, it depends to the speed of its orbit around the sun. if

example

let VE the speed of orbit of earth around the sun

let VP the speed of a planet

so if VE = VP

1 A. U is for 1 year

4 A. U is 4x 1year = 4yeas

if VE has VP a different value, so VE > VP or VE< VP